Investigation on Working Platforms for Tracked Plant - A full scale field study to evaluate the performance of different working platform reinforcements
Typ
Examensarbete för masterexamen
Program
Publicerad
2022
Författare
MALMROS, ELLINOR
RINGDAHL, MATHILDA
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Working platforms are often used on construction sites where the ground conditions
needs to be improved to carry tracked plant such as pile rigs. There are risks
concerning the economy and safety on site if the working platform is not sufficiently
designed to withstand the pressure from the tracks. Reinforcements can be used to
increase the bearing capacity of the working platform. This Master’s thesis studies
the influence of two different types of working platform reinforcements. The types
of reinforcements studied are geogrids and log mats. This was mainly done through
a field trial, although, numerical models and analytical calculations were conducted
to validate and further analyse the behaviour of a reinforced working platform. The
results show that the load spread efficiency is improved when using reinforcements,
however, it could not be positively concluded which type of reinforcement was most
efficient. It was found that the efficiency of the log mat was largely dependent on
the contact surface of the log mat with the working platform hence affecting the
effective load spread area of the log mat. The influence of the geogrid was thought
to be due to mechanical stabilisation of the soil as the load spread efficiency was
improved even for small strains of the geogrid.
Beskrivning
Ämne/nyckelord
working platform , field trial , load spread , reinforcement , geogrid , log mat